Java client fails to connect to database with replication slots registered if targetServerType=master

Hi,

We are trying to use logical decoding on our db (9.4.17), I have written a decoder based on the examples one, it runs ok on my local db, but we found that in another environment we we unable to get a db connection. It turns out to be related to having targetServerType=master in our jdbc connection string, if we set this to ‘any' everything works fine. The error we get when it is set to 'master’ is below. Any ideas what is going on or whether this is a bug.

org.postgresql.util.PSQLException: ERROR: syntax error
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2422)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2167)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:306)
at org.postgresql.core.SetupQueryRunner.run(SetupQueryRunner.java:53)
at org.postgresql.core.v3.ConnectionFactoryImpl.isMaster(ConnectionFactoryImpl.java:701)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:218)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195)
at org.postgresql.Driver.makeConnection(Driver.java:452)
at org.postgresql.Driver.connect(Driver.java:254)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at org.postgresql.ds.common.BaseDataSource.getConnection(BaseDataSource.java:94)
at org.postgresql.ds.common.BaseDataSource.getConnection(BaseDataSource.java:79)
at net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy.getConnection(DataSourceSpy.java:149)
at sun.reflect.GeneratedMethodAccessor503.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.sixty6.as66.platform.service.support.StaticServiceProxyMethodInterceptor.invoke(StaticServiceProxyMethodInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy93.getConnection(Unknown Source)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
at org.sixty6.as66.utils.postgresql.logicaldecoding.LogicalDecodingConsumer$WorkerThread.doRun(LogicalDecodingConsumer.java:86)
at org.sixty6.as66.utils.concurrent.PollingWorkerThread.run(PollingWorkerThread.java:140)